CN202480461U - Polycrystalline diamond compact with stable structure - Google Patents
Polycrystalline diamond compact with stable structure Download PDFInfo
- Publication number
- CN202480461U CN202480461U CN2012201241783U CN201220124178U CN202480461U CN 202480461 U CN202480461 U CN 202480461U CN 2012201241783 U CN2012201241783 U CN 2012201241783U CN 201220124178 U CN201220124178 U CN 201220124178U CN 202480461 U CN202480461 U CN 202480461U
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- polycrystalline diamond
- hard alloy
- layer
- alloy layer
- projection
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Abstract
The utility model discloses a polycrystalline diamond compact with a stable structure. The polycrystalline diamond compact comprises a hard alloy layer and a polycrystalline diamond layer, the upper end face of the hard alloy layer is connected with the lower end face of the polycrystalline diamond layer, a plurality of lugs are arranged on the upper end face of the hard alloy layer, the polycrystalline diamond layer comprises recesses which correspond to the lugs, the sizes and the quantity of the recesses are equal to those of the lugs, and the lugs are embedded into the recesses of the polycrystalline diamond layer and are in interference fit with the recesses. The polycrystalline diamond compact is simple in overall structure and convenient to manufacture, and stress on a combined position of the polycrystalline diamond layer and the hard alloy layer can be lowered, so that combining strength of the polycrystalline diamond layer and the hard alloy layer is enhanced.
Description
Technical field
The utility model relates to the super-hard compound material field, specifically is a kind of constitutionally stable composite polycrystal-diamond.
Background technology
Along with the manufacturing science technology rapid development, various new materials, functional material and composite continue to bring out, and its application constantly enlarges, and the economic and social benefit that is produced also significantly increases.Composite polycrystal-diamond is by polycrystalline diamond layer and the hard alloy layer super-hard compound material that sintering forms under HTHP; As a kind of important tool materials; Composite polycrystal-diamond not only has high hardness and wearability; And have high impact resistance and heat endurance, therefore, composite polycrystal-diamond becomes the critical material of oil, natural gas and geological drilling.
When composite polycrystal-diamond is applied on the drill bit; It is the main working parts on the drill bit; Therefore; The quality of its performance has directly determined the oil-gas geology drilling efficiency, just becomes the direction that people mainly research and develop so how to improve the combination property of composite polycrystal-diamond, and design rational interface shape the combination property that improves composite polycrystal-diamond is had very large effect.As everyone knows, diamond and carbide alloy are two kinds of distinct materials, and both physics, chemical property all differ greatly; The former thermal coefficient of expansion is very little; Latter's thermal coefficient of expansion is very big, when HTHP synthesizes composite polycrystal-diamond, because be rapidly heated and temperature-fall period; So having bigger stress in the junction, interface of two kinds of materials exists; This stress is harmful stress, and its combination property infringement to composite polycrystal-diamond is very big, so the residual stress that how to reduce at the interface becomes present people's question of common concern.
The utility model content
The purpose of the utility model is to overcome the deficiency of prior art, can reduce interface junction stress when providing polycrystalline diamond layer and hard alloy layer sintering, thereby makes both the high a kind of constitutionally stable composite polycrystal-diamond of bond strength.
The purpose of the utility model mainly realizes through following technical scheme: a kind of constitutionally stable composite polycrystal-diamond; Comprise hard alloy layer and polycrystalline diamond layer; The upper surface of said hard alloy layer is connected with the lower surface of polycrystalline diamond layer; The upper surface of said hard alloy layer is provided with a plurality of projections; Said polycrystalline diamond layer constitutes corresponding with bump position, the big or small coupling and the suitable pit of quantity, forms interference fit in the pit of said projection embedding polycrystalline diamond layer and with pit.When the utility model is applied on the drill bit, the upper surface conduct of polycrystalline diamond layer and the contact-making surface of foreign object.
Said hard alloy layer and projection become one.The utility model becomes one hard alloy layer and projection; So; The utility model is when receiving external impacts, and projection can not come off from hard alloy layer yet, thereby avoids causing the syndeton between hard alloy layer and the polycrystalline diamond layer unstable because of projection comes off.
Said projection is up-small and down-big truncated cone shape.
Said hard alloy layer is connected back whole formation cylindrical shape with polycrystalline diamond layer.The whole formation of the utility model cylindrical shape; When so being applied in the utility model on the drill bit; When the utility model receives external impacts; Each position of the utility model is stressed evenly, thereby can avoid the utility model to separate with polycrystalline diamond layer because of discontinuity between each position causes hard alloy layer.
Compared with prior art; The utlity model has following beneficial effect: the hard alloy layer upper surface of the utility model is provided with a plurality of projections; Polycrystalline diamond layer constitutes corresponding with bump position, the big or small coupling and the suitable pit of quantity, and projection embeds in the pit and with pit and forms interference fit, and is like this; The utility model on the basis of sintering further to pass through multiple spot clamped; Thereby reduced the stress of interface junction, strengthened the syndeton of polycrystalline diamond layer and hard alloy layer, promptly strengthened the bond strength between polycrystalline diamond layer and the hard alloy layer.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the structural representation of hard alloy layer among Fig. 1.
The pairing name of Reference numeral is called in the accompanying drawing: 1, hard alloy layer, 2, polycrystalline diamond layer, 3, projection.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is done further to specify, but the embodiment of the utility model is not limited thereto.
Embodiment:
As shown in Figure 1; A kind of constitutionally stable composite polycrystal-diamond; Comprise hard alloy layer 1 and be arranged on the polycrystalline diamond layer 2 of hard alloy layer 1 upper surface that wherein, hard alloy layer 1 is to be main component with high rigidity refractory metal tungsten carbide (WC) micron powder; And be that the binding agent sintering forms with cobalt (Co), polycrystalline diamond layer 2 then is made up of diadust.When making polycrystalline diamond layer 2 receive external impacts, when it transmits external force to hard alloy layer 1 power transmission even, hard alloy layer 1 all constitutes cylindrical shape with polycrystalline diamond layer 2, and both connect, and the back is whole to constitute cylindrical shape.
The upper surface of hard alloy layer 1 is provided with a plurality of projections 3; A plurality of projections 3 all become one with hard alloy layer 1; Promptly when sintered hard alloy layer 1; Above that end face also sintering go out projection 3, projection 3 also is to be main component with high rigidity refractory metal tungsten carbide (WC) micron powder, and is that the binding agent sintering forms with cobalt (Co).A plurality of projections 3 are up-small and down-big truncated cone shape; Polycrystalline diamond layer 2 constitutes a plurality of pits; The pit of polycrystalline diamond layer 2 is corresponding with projection 3 positions, size is mated and quantity is suitable, forms interference fit in the pit of projection 3 embedding polycrystalline diamond layers 2 and with pit.
As stated, then can well realize the utility model.
Claims (4)
1. constitutionally stable composite polycrystal-diamond; Comprise hard alloy layer (1) and polycrystalline diamond layer (2); The upper surface of said hard alloy layer (1) is connected with the lower surface of polycrystalline diamond layer (2); It is characterized in that: the upper surface of said hard alloy layer (1) is provided with a plurality of projections (3); Said polycrystalline diamond layer (2) constitutes corresponding with projection (3) position, the big or small coupling and the suitable pit of quantity, forms interference fit in the pit of said projection (3) embedding polycrystalline diamond layer (2) and with pit.
2. a kind of constitutionally stable composite polycrystal-diamond according to claim 1 is characterized in that: said hard alloy layer (1) and projection (3) become one.
3. a kind of constitutionally stable composite polycrystal-diamond according to claim 1 is characterized in that: said projection (3) is up-small and down-big truncated cone shape.
4. according to each described a kind of constitutionally stable composite polycrystal-diamond of claim 1～3, it is characterized in that: said hard alloy layer (1) is connected back whole formation cylindrical shape with polycrystalline diamond layer (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201241783U CN202480461U (en) | 2012-03-29 | 2012-03-29 | Polycrystalline diamond compact with stable structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201241783U CN202480461U (en) | 2012-03-29 | 2012-03-29 | Polycrystalline diamond compact with stable structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202480461U true CN202480461U (en) | 2012-10-10 |
Family
ID=46954918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201241783U Expired - Lifetime CN202480461U (en) | 2012-03-29 | 2012-03-29 | Polycrystalline diamond compact with stable structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202480461U (en) |
-
2012
- 2012-03-29 CN CN2012201241783U patent/CN202480461U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121010 |
|
| CX01 | Expiry of patent term |